The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 2012
Filed:
Aug. 24, 2009
Toshifumi Tanaka, Toyonaka, JP;
Hirofumi Konishi, Hirakata, JP;
Shin Ukegawa, Kyotanabe, JP;
Shinichi Anami, Hirakata, JP;
Masahiro Seki, Sanjo, JP;
Toshifumi Tanaka, Toyonaka, JP;
Hirofumi Konishi, Hirakata, JP;
Shin Ukegawa, Kyotanabe, JP;
Shinichi Anami, Hirakata, JP;
Masahiro Seki, Sanjo, JP;
Panasonic Electric Works Co., Ltd., Osaka, JP;
Abstract
A discharge lamp lighting device includes: a DC power source; an inverter for inverting the DC power at a predetermined inversion time interval to supply a square wave AC power to a discharge lamp; and a controller for controlling the output power. The controller performs a synchronous operation and controls the DC power source such that DC power outputted during a period other than the output temporarily increasing period in a power increasing period is greater than the DC output power outputted during the period other than the output temporarily increasing period in a rated power period. Further, the controller controls the DC power source such that at least one of an increment of the output power for the output temporarily increasing period and a length of the output temporarily increasing period is less in at least a part of the output increasing period than in the rated power period.